CN115420006A - Air conditioner, control method and device thereof and readable storage medium - Google Patents
Air conditioner, control method and device thereof and readable storage medium Download PDFInfo
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- CN115420006A CN115420006A CN202211079348.5A CN202211079348A CN115420006A CN 115420006 A CN115420006 A CN 115420006A CN 202211079348 A CN202211079348 A CN 202211079348A CN 115420006 A CN115420006 A CN 115420006A
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- 238000000034 method Methods 0.000 title claims abstract description 75
- 230000001502 supplementing effect Effects 0.000 claims abstract description 61
- 239000003507 refrigerant Substances 0.000 claims abstract description 27
- 239000013589 supplement Substances 0.000 claims description 17
- NRNCYVBFPDDJNE-UHFFFAOYSA-N pemoline Chemical compound O1C(N)=NC(=O)C1C1=CC=CC=C1 NRNCYVBFPDDJNE-UHFFFAOYSA-N 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 230000000153 supplemental effect Effects 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 12
- 239000007924 injection Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003519 ventilatory effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides an air conditioner, a control method and a control device thereof and a readable storage medium. The air conditioner comprises an air supplementing pressure sensor, the air supplementing pressure sensor is used for acquiring an actual air supplementing point pressure PI, and the control method comprises the following steps: acquiring the exhaust pressure PD, the suction pressure PS and the actual pressure PI of a gas supplementing point of the compressor; determining a target air supply pressure SPI according to the exhaust pressure PD and the suction pressure PS; determining an air supplementing pressure difference delta P according to the target air supplementing pressure SPI and the actual air supplementing point pressure PI; and adjusting the opening of the electronic expansion valve according to the air replenishing pressure difference delta P. The invention solves the problems that: the technical scheme in the related art can not accurately control the electronic expansion valve, so that the air supplementing pressure is kept at a reasonable level, and further, the stability of the enthalpy injection inlet pressure and the flow of the bypass refrigerant can not be ensured.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner, a control method and a control device of the air conditioner and a readable storage medium of the air conditioner.
Background
The enhanced vapor injection is a hot door technology for improving the lifting capacity of the existing heat pump air conditioning unit, and can effectively improve the displacement of a press and the capacity of the unit by supplementing air at medium pressure. In the enhanced vapor injection unit, the bypass air supply quantity can directly influence the capacity, the energy efficiency and the reliability of the unit. In the prior art, the amount of air supplement is generally controlled by a bypass electronic expansion valve, and the opening degree of the valve is controlled according to the superheat degree of a bypass branch refrigerant. The control method can avoid the liquid refrigerant from impacting the compressor and ensure the reliability of the system, but the temperature control has the characteristics of low precision, slow feedback, easy interference and the like, and the fluctuation of the bypass air supplement amount is easily caused, so that unnecessary vibration, noise and power consumption are caused, and the stability and the reliability of the system are influenced.
It can be seen that the problems in the related art are: the technical scheme in the related art can not accurately control the electronic expansion valve, so that the air supplementing pressure is kept at a reasonable level, and further, the stability of the enthalpy injection inlet pressure and the flow of the bypass refrigerant can not be ensured.
Disclosure of Invention
The invention solves the problems that: the technical scheme in the related art can not accurately control the electronic expansion valve, so that the air supplementing pressure is kept at a reasonable level, and further, the stability of the enthalpy injection inlet pressure and the flow of the bypass refrigerant can not be ensured.
To solve the above problems, a first object of the present invention is to provide a control method of an air conditioner.
A second object of the present invention is to provide a control device for an air conditioner.
A third object of the present invention is to provide an air conditioner.
A fourth object of the present invention is to provide a readable storage medium.
To achieve the first object of the present invention, an embodiment of the present invention provides a control method for an air conditioner, where the air conditioner includes an air supply pressure sensor, the air supply pressure sensor is configured to obtain an actual air supply pressure PI of an air supply point, and the control method includes: acquiring the exhaust pressure PD, the suction pressure PS and the actual pressure PI of a gas supplementing point of the compressor; determining a target air supply pressure SPI according to the exhaust pressure PD and the suction pressure PS; determining an air supplementing pressure difference delta P according to the target air supplementing pressure SPI and the actual air supplementing point pressure PI; and adjusting the opening of the electronic expansion valve according to the air replenishing pressure difference delta P.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: compared with the prior art, the electronic expansion valve is additionally provided with the air supplementing pressure sensor 250, the target air supplementing pressure SPI is determined according to the exhaust pressure PD and the suction pressure PS, the air supplementing pressure difference delta P is determined according to the target air supplementing pressure SPI and the actual air supplementing point pressure PI, and finally the opening degree of the electronic expansion valve is adjusted according to the air supplementing pressure difference delta P. Compared with the control method for the target superheat degree in the prior art, the control method for the electronic expansion valve is more stable, can control the electronic expansion valve more accurately, and can effectively avoid the problems of vibration, noise and the like caused by temperature fluctuation.
In one embodiment of the present invention, determining the target ventilatory pressure SPI based on the discharge pressure PD and the suction pressure PS comprises: determining the middle pressure of the compressor according to the discharge pressure PD and the suction pressure PS; acquiring a gas supplementing pressure correction coefficient delta; and determining the target air supply pressure SPI according to the middle pressure and the correction coefficient delta.
Compared with the prior art, the technical scheme has the following technical effects: according to the exhaust pressure PD and the suction pressure PS, the middle pressure of the compressor can be accurately determined, and further the target gas supplementing pressure SPI can be accurately determined by a follow-up method.
In one embodiment of the present invention, determining the middle pressure of the compressor based on the discharge pressure PD and the suction pressure PS comprises:
according to the middle pressureAnd determining a target inflation pressure SPI by using the force and correction coefficient delta, wherein the steps comprise:
compared with the prior art, the technical scheme has the following technical effects: the method can accurately and efficiently determine the target air supplement pressure SPI, and further helps a subsequent control method to realize more efficient and accurate control.
In one embodiment of the present invention, adjusting the opening degree of the electronic expansion valve according to the air supply pressure difference Δ P comprises: determining the opening variation quantity delta EV = delta P K of the electronic expansion valve according to delta P every period t 1 (ii) a Adjusting the opening degree of the electronic expansion valve according to the opening degree variation delta EV of the electronic expansion valve; wherein, K 1 Is an opening degree adjustment coefficient.
Compared with the prior art, the technical scheme has the following technical effects: according to the electronic expansion valve openness change amount delta EV, the openness of the electronic expansion valve is adjusted, the air supplement requirement of the compressor in the current pressure state can be accurately met, on the premise that the reliability is met, the air supplement pressure is kept at a reasonable level, the enthalpy injection inlet pressure and the bypass refrigerant flow are stable, and the system reliability is effectively improved.
In one embodiment of the present invention, the electronic expansion valve opening variation Δ EV = Δ P × K is determined from Δ P at every cycle t 1 Then, the control method further includes: comparing the opening variation delta EV of the electronic expansion valve with the minimum adjustment delta EVA; when | Δ EV | < Δ EVA, the opening degree of the electronic expansion valve is maintained constant.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the setting of the minimum regulating quantity delta EVA can ensure that the opening degree regulation of the control valve is stabilized in a reasonable range, and effectively improves the stability and reliability of the control method.
In an embodiment of the present invention, the air conditioner includes an air supply temperature sensor, the air supply temperature sensor is configured to obtain an actual temperature TI of an air supply point, and obtain an air supply pressure correction coefficient δ, and the air supply pressure correction coefficient δ includes: determining the saturation temperature TSI according to the actual pressure PI of the air supplementing point; determining the superheat degree SH of the bypass refrigerant according to the actual temperature TI and the saturation temperature TSI of the gas supplementing point; and determining a gas supplementing pressure correction coefficient delta according to the superheat SH of the bypass refrigerant.
Compared with the prior art, the technical scheme has the following technical effects: the control method of the invention can make the pressure of the air supply inlet stable and slightly higher than the medium pressure of the compressor, thereby matching the operation requirement of the compressor better; the control method provided by the invention gives consideration to superheat degree control on the basis of target pressure control, and gives consideration to stability and system reliability.
In an embodiment of the present invention, obtaining the compensation pressure correction coefficient δ further includes: re-determining the air supply pressure correction coefficient delta every other period T; wherein T = T × a, a being an integer greater than 1.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the setting of the period T of the method effectively considers the stability of medium-pressure regulation and the timeliness of superheat correction, and further improves the stability and reliability of the control method.
In one embodiment of the present invention, the control method further includes: judging whether the conditions are met: whether the superheat degree SH of the bypass refrigerant is less than a first threshold value for n continuous periods T or not; and judging whether the second condition is met: the current valve opening of the electronic expansion valve is the minimum valve opening EVM; judging whether the third condition is met: the compensation air pressure correction coefficient delta is the minimum correction coefficient delta min (ii) a On the premise that the first condition is met, if either one of the second condition and the third condition is met, the compressor is restarted; wherein n is a positive integer.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the control method of the invention gives consideration to the function of protection exit, thereby effectively ensuring the safety and reliability of the control method and ensuring the control method to be more stable.
To achieve the second objective of the present invention, an embodiment of the present invention provides a control device for an air conditioner, where the air conditioner includes an air supply pressure sensor, the air supply pressure sensor is used to obtain an actual air supply pressure PI, and the control device includes: the detection module is used for acquiring the exhaust pressure PD, the suction pressure PS and the actual pressure PI of the air supplementing point of the compressor; the first calculation module is used for determining a target air supply pressure SPI according to the exhaust pressure PD and the suction pressure PS; the second calculation module is used for determining the air supplementing pressure difference delta P according to the target air supplementing pressure SPI and the air supplementing point actual pressure PI; and the control module is used for adjusting the opening of the electronic expansion valve according to the air supplementing pressure difference delta P.
The control device of the air conditioner according to the embodiment of the present invention implements the steps of the control method of the air conditioner according to any embodiment of the present invention, and thus has all the advantages of the control method of the air conditioner according to any embodiment of the present invention, and details thereof are not repeated herein.
To achieve the third object of the present invention, an embodiment of the present invention provides an air conditioner including: the air conditioner control method comprises a processor, a memory and a program or an instruction which is stored on the memory and can run on the processor, wherein the program or the instruction realizes the steps of the air conditioner control method according to any embodiment of the invention when being executed by the processor.
The air conditioner according to the embodiment of the present invention implements the steps of the method for controlling an air conditioner according to any embodiment of the present invention, so that the method for controlling an air conditioner according to any embodiment of the present invention has all the advantages, and details are not described herein.
To achieve the fourth object of the present invention, embodiments of the present invention provide a readable storage medium on which a program or instructions are stored, the program or instructions, when executed by a processor, implementing the steps of the control method of an air conditioner according to any one of the embodiments of the present invention.
The readable storage medium according to the embodiment of the present invention implements the steps of the control method of the air conditioner according to any embodiment of the present invention, so that the method has all the advantages of the control method of the air conditioner according to any embodiment of the present invention, and the description thereof is omitted here.
Drawings
Fig. 1 is a flowchart illustrating steps of a control method of an air conditioner according to some embodiments of the present invention;
FIG. 2 is one of the system schematics of an air conditioner according to some embodiments of the present invention;
fig. 3 is a second schematic diagram of an air conditioner according to some embodiments of the present invention.
Description of reference numerals:
100-a condenser; 200-three-way; 210-air supplement electromagnetic valve; 220-air supply electronic expansion valve; 230-a capillary tube; 240-an economizer; 250-air supply pressure sensor; 260-air supply temperature sensor; 300-spraying enthalpy press; 310-exhaust pressure sensor; 320-suction pressure sensor.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
[ first embodiment ] A
Referring to fig. 1, the present embodiment provides a control method of an air conditioner, the air conditioner includes an air supply pressure sensor 250, the air supply pressure sensor 250 is configured to obtain an actual air supply pressure PI of an air supply point, and the control method includes:
s100: acquiring the exhaust pressure PD, the suction pressure PS and the actual pressure PI of a gas supplementing point of the compressor;
s200: determining a target air supply pressure SPI according to the exhaust pressure PD and the suction pressure PS;
s300: determining an air supplementing pressure difference delta P according to the target air supplementing pressure SPI and the actual air supplementing point pressure PI;
s400: and adjusting the opening of the electronic expansion valve according to the air supplementing pressure difference delta P.
In this embodiment, the air conditioner includes at least two modes of cooling and heating.
Referring to fig. 2, fig. 2 is a schematic diagram of a system cycle of an air conditioner system in a cooling mode, in which a refrigerant flows through a condenser 100 at a tee 200, a main path flows to a stop valve through an economizer 240, and then enters an internal machine, a bypass path flows through an air-supply solenoid valve 210, and then enters the economizer 240 to exchange heat with the refrigerant of the main path after being throttled by a capillary tube 230 and an air-supply electronic expansion valve 220, and finally returns to an air-supply port of a compressor, namely an air-supply port of an enthalpy-injection press 300.
Referring to fig. 3, fig. 3 is a schematic diagram of a system cycle of an air conditioner system in a heating mode, after a refrigerant flows out of an internal machine from a stop valve, the refrigerant is shunted at a tee 200, a main circuit enters a condenser 100 for heat exchange after being throttled by a main electronic expansion valve, and finally returns to a return air port of a compressor; the bypass path passes through the air-supply solenoid valve 210, throttled by the capillary tube 230 and the air-supply electronic expansion valve 220, enters the economizer 240 to exchange heat with the main path refrigerant, and finally returns to the air-supply port of the compressor, namely the air-supply port of the enthalpy-injection press 300.
It should be noted that, in both cooling and heating modes, the bypass refrigerant is passed through the economizer 240 to exchange heat with the main refrigerant and finally returned to the compressor inlet, and the flow direction is identical to the refrigerant state, so that the same auxiliary valve control method can be used for both cooling mode and heating mode.
It should be noted that the electronic expansion valves presented in the present invention are all referred to as the air make-up electronic expansion valve 220.
Further, in S100, the discharge pressure PD, the suction pressure PS, and the supplement point actual pressure PI of the compressor are acquired. The exhaust pressure sensor 310 is arranged at an exhaust port of the enthalpy injection press 300 and is used for acquiring the exhaust pressure PD of the compressor; the suction pressure sensor 320 sprays the suction port of the enthalpy compressor 300 to obtain the suction pressure PS of the compressor; the air supply pressure sensor 250 is arranged on the air supply pipeline and used for acquiring the actual pressure PI of the air supply point.
Further, in S300, the air supply pressure difference Δ P is determined according to the target air supply pressure SPI and the air supply point actual pressure PI. Note that Δ P = SPI-PI.
Compared with the prior art, the electronic expansion valve opening degree adjusting method has the advantages that the air supplementing pressure sensor 250 is additionally arranged, the target air supplementing pressure SPI is determined according to the exhaust pressure PD and the suction pressure PS, the air supplementing pressure difference delta P is determined according to the target air supplementing pressure SPI and the actual air supplementing point pressure PI, and finally the opening degree of the electronic expansion valve is adjusted according to the air supplementing pressure difference delta P. Compared with the control method for the target superheat degree in the prior art, the control method for the electronic expansion valve is more stable, can control the electronic expansion valve more accurately, and can effectively avoid the problems of vibration, noise and the like caused by temperature fluctuation.
Further, determining the target air supplement pressure SPI according to the exhaust pressure PD and the suction pressure PS includes:
s210: determining the middle pressure of the compressor according to the exhaust pressure PD and the suction pressure PS;
s220: acquiring a gas supplementing pressure correction coefficient delta;
s230: and determining the target air supply pressure SPI according to the middle pressure and the correction coefficient delta.
Understandably, according to the discharge pressure PD and the suction pressure PS, the middle pressure of the compressor can be accurately determined, thereby helping the subsequent method to more accurately determine the target air supplement pressure SPI.
Further, determining the middle pressure of the compressor according to the discharge pressure PD and the suction pressure PS comprises:
S211：
determining a target inflation pressure SPI according to the middle pressure and the correction coefficient delta, and comprises the following steps:
S231：
understandably, the method can accurately and efficiently determine the target air supplement pressure SPI, and further helps a subsequent control method to realize more efficient and accurate control.
Further, according to the air supply pressure difference Δ P, adjusting the opening degree of the electronic expansion valve includes:
s410: determining the opening variation quantity delta EV = delta P K of the electronic expansion valve according to delta P every period t 1 ；
S420: adjusting the opening degree of the electronic expansion valve according to the opening degree variation delta EV of the electronic expansion valve;
wherein, K 1 Is the opening degree adjustment coefficient.
The period t is an electronic expansion valve adjustment period, in order toThe adjustment timeliness is ensured, and the period t is preferably 20s-30s. K 1 The opening degree regulating coefficient is used for controlling the regulating speed of the electronic expansion valve.
Understandably, the opening of the electronic expansion valve is adjusted according to the opening variation delta EV of the electronic expansion valve, so that the air supplementing requirement of the compressor in the current pressure state can be accurately met, the air supplementing pressure is kept at a reasonable level on the premise of meeting the reliability, the enthalpy injection inlet pressure and the bypass refrigerant flow are ensured to be stable, and the system reliability is effectively improved.
Further, at every cycle t, the electronic expansion valve opening degree variation amount Δ EV = Δ P × K is determined from Δ P 1 Then, the control method further includes:
s415: comparing the opening variation delta EV of the electronic expansion valve with the minimum adjustment delta EVA;
s416: when | Δ EV | < Δ EVA, the opening degree of the electronic expansion valve is maintained constant.
In this embodiment, when | Δ EV | < Δ EVA, the opening of the electronic expansion valve is maintained constant, and the actual pressure PI at the air supply point is in the range of SPI- Δ EVA/K 1 ＜PI＜SPI+ΔEVA/K 1 。
Understandably, the setting of the minimum adjustment amount Δ EVA can stabilize the opening adjustment of the control valve in a reasonable range, and effectively improve the stability and reliability of the control method of the invention.
Further, the air conditioner includes an air supply temperature sensor 260, the air supply temperature sensor 260 is configured to obtain an actual air supply point temperature TI, and obtain an air supply pressure correction coefficient δ, including:
s221: determining the saturation temperature TSI according to the actual pressure PI of the gas supplementing point;
s222: determining the superheat SH of the bypass refrigerant according to the actual temperature TI and the saturation temperature TSI of the gas supplementing point;
s223: and determining a gas supplementing pressure correction coefficient delta according to the superheat SH of the bypass refrigerant.
In this embodiment, the air supply temperature sensor 260 is disposed on the air supply pipeline for obtaining the actual temperature TI of the air supply point.
Illustratively, the initial value of δ is δ 0 ，δ 0 Slightly larger than 1, such as 1.2, so as to ensure that the initial air supply pressure is larger than the medium pressure.
Further, in S222, the superheat SH of the bypass refrigerant is determined according to the actual temperature TI of the gas supply point and the saturation temperature TSI. I.e. SH = TI-TSI.
Further, in S223, the supplement-air pressure correction coefficient δ is determined based on the degree of superheat SH of the bypass refrigerant. That is, different compensation pressure correction coefficients δ are determined according to different degrees of superheat SH of the bypass refrigerant, and the correction is exemplarily shown in the following table.
| SH Range | SH＜2 | 2≤SH＜3 | 3≤SH≤10 | 10＜SH |
| Δδ | -0.1 | -0.05 | 0 | +0.1 |
Wherein delta is the correction quantity of delta, if the current air supply correction value delta T Last cycle correction value delta T-1 Then δ T ＝δ T-1 +Δδ。
When SH < 2, delta = -0.1, delta T ＝δ T-1 -0.1，SPI T ＝SPI T-1 *(δ T /δ T-1 )＜SPI T-1 (ii) a At this time, the PI value is unchanged and is approximately equal to SPI T-1 If the delta P value is negative, the opening of the electronic expansion valve is reduced, after the opening of the electronic expansion valve is reduced, the throttling effect is enhanced, the PI value is reduced and is close to the SPI, the TI value is increased due to the increase of heat exchange temperature difference, the TSI is reduced due to the reduction of the PI, the SH is increased, and the regulation is stable until the SH is more than or equal to 3 and less than or equal to 10 and the delta P meets the stable range.
When SH is more than or equal to 2 and less than 3, the adjusting mode is consistent with that when SH is less than 2, but delta =0.05, the delta correction range is reduced, and the opening degree of the electronic expansion valve is prevented from being adjusted excessively.
When SH is more than or equal to 3 and less than or equal to 10, delta is kept unchanged.
Δ δ =0.1, δ when 10 < SH T ＝δ T-1 +0.1，SPI T ＝SPI T-1 *(δ T /δ T-1 )＞SPI T-1 (ii) a At this time, the PI value is unchanged and is approximately equal to SPI T-1 If the Δ P value is positive, the opening of the electronic expansion valve is increased, and then the throttling effect is weakened after the opening of the electronic expansion valve is increased, the PI value is increased and approaches to the SPI, the TI value is reduced due to the reduction of the heat exchange temperature difference, the TSI value is increased due to the increase of the PI, and SH is reduced until SH is greater than or equal to 3 and less than or equal to 10, and the Δ P satisfies the stable range, and then the adjustment is stable.
In summary, the final adjustment results for the above 4 initial superheat degrees are: delta at initial opening delta 0 Gradually adjusting the stability on the basis of the obtained product, and finally adjusting the SH to be more than or equal to 3 and less than or equal to 10.
The control method can stabilize the pressure of the air supply inlet to be slightly higher than the medium pressure of the compressor, so that the operation requirement of the compressor is matched; the control method of the invention gives consideration to superheat degree control on the basis of target pressure control, and gives consideration to stability and system reliability.
Further, acquiring a compensation pressure correction coefficient δ, further comprising:
s224: re-determining the air supply pressure correction coefficient delta every other period T;
wherein T = T × a, a being an integer greater than 1.
In this embodiment, the period T is a correction period of δ, and needs to be an integral multiple of the period T, preferably, 3 to 5min, taking into account the stability of medium-pressure regulation and the timeliness of superheat correction.
Understandably, the setting of the period T of the method effectively considers the stability of medium-pressure regulation and the timeliness of superheat correction, thereby improving the stability and reliability of the control method.
Further, the control method further comprises:
s500: judging whether the conditions are met: whether the superheat degree SH of the bypass refrigerant is less than a first threshold value for n continuous periods T or not;
s510: and judging whether the second condition is met: the current valve opening of the electronic expansion valve is the minimum valve opening EVM;
s520: judging whether the third condition is met: the compensation air pressure correction coefficient delta is the minimum correction coefficient delta min ；
S530: on the premise that the first condition is met, if either one of the second condition and the third condition is met, the compressor is restarted;
wherein n is a positive integer.
In this embodiment, the minimum valve opening EVM is an adjustment minimum value of the electronic expansion valve opening, and is related to the minimum number of opening steps of the valve itself, which is generally 48P or 60P; minimum supplement correction factor delta min I.e. the minimum value of the adjustment of the compensation coefficient, to ensure that the compensation pressure is greater than the medium pressure and to avoid repeated pressure shocks, preferably delta min ＝0.95。
It should be noted that, when the condition one and the condition two are simultaneously satisfied, or the condition one or the condition three are simultaneously satisfied, the unit exits the enhanced vapor injection medium-pressure control, the bypass electromagnetic valve is closed, the opening of the electronic expansion valve is closed to be 0, the compressor is restarted or the protection exit is suspended after the unit is powered off, and the determination of the vapor injection control is entered again.
Understandably, the control method of the invention takes the protection exit function into consideration, thereby effectively ensuring the safety and reliability of the control method and enabling the control method to be more stable.
[ second embodiment ]
The present embodiment provides a control apparatus of an air conditioner,
the control device of the air conditioner according to the embodiment of the present invention implements the steps of the control method of the air conditioner according to any embodiment of the present invention, and thus has all the advantages of the control method of the air conditioner according to any embodiment of the present invention, and details thereof are not repeated herein.
[ third embodiment ]
The embodiment provides an air conditioner, which includes: a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the control method of the air conditioner according to any embodiment of the present invention.
The air conditioner according to the embodiment of the present invention implements the steps of the control method of the air conditioner according to any embodiment of the present invention, so that all the advantages of the control method of the air conditioner according to any embodiment of the present invention are achieved, and are not described herein again.
[ fourth embodiment ]
The present embodiment provides a readable storage medium on which a program or instructions are stored, the program or instructions implementing the steps of the control method of the air conditioner according to any one of the embodiments of the present invention when executed by a processor.
The readable storage medium according to the embodiment of the present invention implements the steps of the control method of the air conditioner according to any embodiment of the present invention, so that the method has all the advantages of the control method of the air conditioner according to any embodiment of the present invention, and the description thereof is omitted here.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. A control method of an air conditioner is characterized in that the air conditioner comprises an air supplementing pressure sensor, the air supplementing pressure sensor is used for acquiring an actual air supplementing point pressure PI, and the control method comprises the following steps:
acquiring the exhaust pressure PD, the suction pressure PS and the actual pressure PI of the air supplementing point of the compressor;
determining a target air replenishing pressure SPI according to the exhaust pressure PD and the suction pressure PS;
determining air supplement pressure difference delta P according to the target air supplement pressure SPI and the air supplement point actual pressure PI;
and adjusting the opening of the electronic expansion valve according to the air supplementing pressure difference delta P.
2. The control method according to claim 1, wherein the determining a target supplemental gas pressure SPI from the discharge pressure PD and the suction pressure PS comprises:
determining the middle pressure of the compressor according to the exhaust pressure PD and the suction pressure PS;
acquiring a gas supplementing pressure correction coefficient delta;
and determining the target gas supplementing pressure SPI according to the middle pressure and the correction coefficient delta.
3. The control method according to claim 2,
the step of determining the middle pressure of the compressor according to the discharge pressure PD and the suction pressure PS comprises the following steps: the above-mentioned
Determining the target inflation pressure SPI according to the middle pressure and the correction coefficient delta comprises the following steps:
4. the control method according to claim 3, wherein the adjusting the opening degree of the electronic expansion valve according to the make-up air pressure difference Δ P comprises:
determining the opening variation quantity delta EV = delta P K of the electronic expansion valve according to delta P every period t 1 ；
Adjusting the opening degree of the electronic expansion valve according to the opening degree variation delta EV of the electronic expansion valve;
wherein, K 1 Is an opening degree adjustment coefficient.
5. The control method according to claim 4, characterized in that the electronic expansion valve opening variation Δ EV = Δ P × K is determined from Δ P at said every cycle t 1 Then, the control method further includes:
comparing the opening variation quantity delta EV of the electronic expansion valve with the minimum adjustment quantity delta EVA;
when | Δ EV | < Δ EVA, the opening degree of the electronic expansion valve is maintained constant.
6. The control method according to claim 4, wherein the air conditioner includes a temperature sensor for supplying air, the temperature sensor for supplying air is used for obtaining an actual temperature TI of an air supply point, and the obtaining a correction coefficient δ for pressure of supplied air includes:
determining the saturation temperature TSI according to the actual pressure PI of the gas supplementing point;
determining the superheat SH of a bypass refrigerant according to the actual temperature TI of the gas supplementing point and the saturation temperature TSI;
and determining the gas supplementing pressure correction coefficient delta according to the superheat degree SH of the bypass refrigerant.
7. The control method according to claim 6, wherein the obtaining of the supplement-air pressure correction coefficient δ further comprises:
re-determining the air supply pressure correction coefficient delta every other period T;
wherein T = T × a, a being an integer greater than 1.
8. The control method according to claim 7, characterized by further comprising:
judging whether the conditions are met: whether the superheat degree SH of the bypass refrigerant is less than a first threshold value for n continuous periods T;
and judging whether the second condition is met: the current valve opening of the electronic expansion valve is the minimum valve opening EVM;
and judging whether the third condition is met: the air supply pressure correction coefficient delta is a minimum correction coefficient delta min ；
If the condition two and the condition three meet any one of the conditions under the condition that the condition one is met, restarting the compressor;
wherein n is a positive integer.
9. The utility model provides a controlling means of air conditioner, its characterized in that, the air conditioner includes tonifying qi pressure sensor, tonifying qi pressure sensor is used for acquireing tonifying qi point actual pressure PI, controlling means includes:
the detection module is used for acquiring the exhaust pressure PD, the suction pressure PS and the actual pressure PI of the air supplementing point of the compressor;
the first calculation module is used for determining a target gas supplementing pressure SPI according to the exhaust pressure PD and the suction pressure PS;
the second calculation module is used for determining air supplement pressure difference delta P according to the target air supplement pressure SPI and the air supplement point actual pressure PI;
and the control module is used for adjusting the opening of the electronic expansion valve according to the air supplementing pressure difference delta P.
10. An air conditioner, characterized in that the air conditioner comprises: a processor, a memory and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implement the steps of the control method of any one of claims 1 to 8.
11. A readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, implement the steps of the control method according to any one of claims 1 to 8.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371514A (en) * | 2015-12-10 | 2016-03-02 | 珠海格力电器股份有限公司 | Compression system with second vapor injection function, air conditioning system and judgment and control method of compression system |
| CN106152342A (en) * | 2016-07-04 | 2016-11-23 | 珠海格力电器股份有限公司 | A kind of discharge capacity that becomes is than Two-stage Compression air-conditioning system and control method thereof |
| EP3208561A1 (en) * | 2016-02-16 | 2017-08-23 | Lennox Industries Inc. | Method and apparatus for re-heat dehumidification utilizing a variable speed compressor system |
| CN109099610A (en) * | 2018-09-07 | 2018-12-28 | 青岛海信日立空调系统有限公司 | Refrigeration system, air conditioner and the air-conditioner control method of Gas-supplying enthalpy-increasing |
| CN110848845A (en) * | 2019-11-18 | 2020-02-28 | 珠海格力电器股份有限公司 | Air-supplementing enthalpy-increasing heat pump system, control method and air conditioner |
| CN112178863A (en) * | 2020-08-17 | 2021-01-05 | 珠海格力电器股份有限公司 | Refrigerant quantity control device and method and air conditioner |
| CN113465105A (en) * | 2021-06-21 | 2021-10-01 | 青岛海尔空调电子有限公司 | Air-supplying enthalpy-increasing control method for air conditioner |
-
2022
- 2022-09-05 CN CN202211079348.5A patent/CN115420006A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371514A (en) * | 2015-12-10 | 2016-03-02 | 珠海格力电器股份有限公司 | Compression system with second vapor injection function, air conditioning system and judgment and control method of compression system |
| EP3208561A1 (en) * | 2016-02-16 | 2017-08-23 | Lennox Industries Inc. | Method and apparatus for re-heat dehumidification utilizing a variable speed compressor system |
| CN106152342A (en) * | 2016-07-04 | 2016-11-23 | 珠海格力电器股份有限公司 | A kind of discharge capacity that becomes is than Two-stage Compression air-conditioning system and control method thereof |
| CN109099610A (en) * | 2018-09-07 | 2018-12-28 | 青岛海信日立空调系统有限公司 | Refrigeration system, air conditioner and the air-conditioner control method of Gas-supplying enthalpy-increasing |
| CN110848845A (en) * | 2019-11-18 | 2020-02-28 | 珠海格力电器股份有限公司 | Air-supplementing enthalpy-increasing heat pump system, control method and air conditioner |
| CN112178863A (en) * | 2020-08-17 | 2021-01-05 | 珠海格力电器股份有限公司 | Refrigerant quantity control device and method and air conditioner |
| CN113465105A (en) * | 2021-06-21 | 2021-10-01 | 青岛海尔空调电子有限公司 | Air-supplying enthalpy-increasing control method for air conditioner |
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